DataWarrior does not directly calculate the drugscore as the Property Explorer did.
You can calculate the drugscore with a formula after calculating the properties that
the drugscore is composed of.

I have created a macro file that does everything for you and attached it to this message.
I suggest that you download and save it in your 'Macro' folder of your DataWarrior
installation, which usually would be on Windows here:

c:\Program Files (x86)\DataWarrior\Macro\

If there is no Macro folder, you have to create one. If you work on Linux or the Macintosh,
then it works analogously. Once the dwam file is in the Macro-folder and after starting
DataWarrior you find in its Macro-menu under Run-Macro 'Calculate Properties'.
When you select that, DataWarrior calculates all needed properties and afterwards from
them the DrugScore.

since the macro is not described anywhere except on this website I suggest to cite this URL and/or the DataWarrior paper available at http://pubs.acs.org/doi/abs/10.1021/ci500588j. I will soon release a DataWarrior update and the macro will be part of it.